Kenan Thompson reprised his well-known Bill Cosby impression during the "Celebrity Jeopardy" sketch on the "Saturday Night Live" 40th anniversary special, but the writers originally approached Eddie Murphy to revive his impression of the disgraced comedian.

Norm Macdonald revealed the original plan for the beloved "Jeopardy" parody in a string of tweets on Wednesday night. He worked with Steve Higgins and Lori Jo Hoekstra on the sketch and Higgins had the idea to bring in Murphy, who would be making his return to the "SNL" stage for the first time in more than 30 years.

Darrel Hammond, performing as his infamous Sean Connery, would choose the category "Potent Potables" where a video daily double would appear. Macdonald predicted the audience "would know what to do" when Murphy stepped out on an adjacent stage dressed in a multi-color sweater à la Cosby.

Once they had a plan, someone actually had to call Murphy and ask him to participate. Macdonald waited until Saturday, the day before the show, to approach the man who many consider "single-handedly" saved 'SNL' when creator Lorne Michaels temporarily left the show in 1980.

Macdonald spoke with Murphy for an hour in his dressing room, though he couldn't convince him to do it. Murphy did make an awkward appearance during the show, but didn't appear in any sketches.